You can verify that data has been retained by viewing the icon in the Retained Data column for each design point. This icon indicates the availability, validity, and state of the retained data for the design point.

Different kinds of changes to the project have different impacts on retained data. Changes to the parameter values for the design point cause the retained data to become out-of-date but still valid. Non-parametric changes cause the retained data for non-active design points to become invalid.

The state of the design point and the validity of its retained data do not necessarily match. It is possible for a design point to be up-to-date while its retained data is invalid or vice versa.

When used in the Retained Data column, icons have slightly different meanings than they do elsewhere in Workbench. The following table describes the meaning of each icon within the context of retained design point data.

Icon	State/Validity	Description
	Valid and up-to-date	The design point has valid retained data that is up-to-date. The retained data is available to be exported.
	Valid but out-of-date	The design point has valid retained data, but the retained data is out-of-date because of a change to the design point's parameter values. The retained data is available to be exported.
	Invalid or non-existing	The design point either does not have retained data or previously retained data has been invalidated by a non-parametric change. The retained data is not available to be exported.

Each state is illustrated in the image below, as follows: